7 U.S.C. § 4813
(a) Demand for refund; persons eligible Notwithstanding any other provision of this chapter, prior to the approval of the continuation of an order pursuant to the referendum required under section 4811(a) of this title, any person shall have the right to demand and receive from the Board a refund of an assessment collected under section 4809 of this title if such person—
(c) Payment of refund on submission of satisfactory proof Such refund shall be made not later than 30 days after demand is received therefore 1 on submission of proof satisfactory to the Board that the producer, person, or importer—
(Pub. L. 99–198, title XVI, § 1624, , 99 Stat. 1619.)
Section effective , see section 1631 of Pub. L. 99–198, set out as a note under section 4801 of this title.
1 So in original. Probably should be “therefor”.